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Session 6 Study Guide: Comparing Two Groups

Data Science for Young Minds — Grade 2

Key Topics

TopicDetails
Asking the same question to two groupsAsking the same question to two groups
Building side-by-side bar graphs for comBuilding side-by-side bar graphs for comparison
Identifying similarities and differencesIdentifying similarities and differences between groups
Writing comparison sentences using dataWriting comparison sentences using data

Lesson Summaries

Lesson 1: Same Question, Two Groups

Ask the same question to two different groups. Do 2nd graders and 1st graders like the same things?

Lesson 2: Side-by-Side Graphs

Build two bar graphs next to each other using the same scale. Now you can compare groups visually!

Lesson 3: What Is the Same? What Is Different?

Look at both graphs together. Where do the groups agree? Where do they differ?

Lesson 4: Writing Comparison Sentences

Practice writing: 'Both groups liked ___ the most, but Group A liked ___ more than Group B did.'

Review Questions

  1. To compare two groups, you need to...
  2. Side-by-side bar graphs help you...
  3. Both groups chose 'pizza' the most. This means...
  4. Why must both graphs use the SAME scale?
  5. Group A: Dog=8, Cat=4. Group B: Dog=3, Cat=7. What can you say?
  6. A comparison sentence starts with...
  7. What if both groups give the same results?
  8. Comparing two groups is useful because...